New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii

Jeong, Doohee1; Liu, Qingsong1,2; Yamamoto, Yuhji3; Yu, Yongjae4; Zhao, Xiang5; Qin, Huafeng6

2021-07-16

10.1186/s40623-021-01473-6

EARTH PLANETS AND SPACE   影响因子和分区

1880-5981

Thellier-type paleointensity experiments associated with partial thermal remanent magnetization checks have been widely used to determine paleointensity values from volcanic and archaeological media. However, previous studies have revealed that a substantial portion of paleointensity results with positive checks for historical lava samples largely fails to predict known Earth magnetic field intensity values. To determine the fidelity of paleointensity values, conventional Thellier-type paleointensity experiments were performed on Kilauea lava flows that erupted in 1960. The positive partial thermal remanent magnetization checks for our results range from 30.28 +/- 1.38 mu T to 52.94 +/- 1.89 mu T. This strongly indicates that conventional paleointensity checks cannot guarantee the fidelity of paleointensity results, especially when the unblocking temperatures for the newly formed magnetic particles are higher than the treatment temperature. Therefore, in this study, to check for thermal alteration during heating, the temperature dependence of the hysteresis parameter measured at room temperature for the thermally treated samples was also measured. Our new results show that nearly all biased paleointensity values correspond to a ratio of the coercivity of remanence to the magnetic coercivity of > 3 and a chemical alteration index > similar to 10%, which indicates the strong effect of the domain state and thermal alteration on the fidelity of the paleointensity results. Our study provides feasible criteria to further improve the fidelity of paleointensity estimations.

Thellier-type experiment Paleointensity Domain state Thermal alteration

SCI

英语

第一 ; 通讯

National Science Foundation of China[41874078] ; Shenzhen Science and Technology Program[KQTD20170810111725321] ; National Research Foundation of Korea (NRF) - Korea government (Ministry of Science and ICT, MSIT)[2021M3E1A1085200]

Geology

Geosciences, Multidisciplinary

WOS:000675370600001

SPRINGER

GEOSCIENCES

Web of Science

1.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Ctr Marine Magnetism CM2, Shenzhen 518055, Peoples R China
2.Southern Marine Sci & Engn Guangdong Lab, Guangzhou, Peoples R China
3.Kochi Univ, Ctr Adv Marine Core Res, Nankoku, Kochi 7838502, Japan
4.Chungnam Natl Univ, Dept Geol Sci, Daejeon 34134, South Korea
5.Australian Natl Univ, Res Sch Earth Sci, Canberra, ACT, Australia
6.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Palaeomagnetism & Geochronol Lab, Beijing 100029, Peoples R China

Jeong, Doohee,Liu, Qingsong,Yamamoto, Yuhji,et al. New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii[J]. EARTH PLANETS AND SPACE,2021,73(1).

Jeong, Doohee,Liu, Qingsong,Yamamoto, Yuhji,Yu, Yongjae,Zhao, Xiang,&Qin, Huafeng.(2021).New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii.EARTH PLANETS AND SPACE,73(1).

Jeong, Doohee,et al."New criteria for selecting reliable Thellier-type paleointensity results from the 1960 Kilauea lava flows, Hawaii".EARTH PLANETS AND SPACE 73.1(2021).